Tonight's TV picks: 'The Blacklist' ends Season 1 with 'game changer'

"24: Live Another Day" (9 p.m., Fox): Jack Bauer's (Kiefer Sutherland) adventures in London continue, but too bad his schedule is so hectic. Doesn't leave much time for sightseeing.

"The Blacklist" (10 p.m., NBC): The drama closes out its highly successful freshman season with an episode that producers promise is a "game changer." That's great, but what we really want to know is the true identity of Liz's mysterious husband (Ryan Eggold).

"Castle" (10:01 p.m., ABC): The season finale is titled "For Better or Worse," which has us a little leery. Are Richard Castle (Nathan Fillion) and Katherine Beckett (Stana Katic) finally going to walk down the aisle? Or is something crummy going to happen to ruin things?

James Spader and Megan Boone star on NBC's "The Blacklist." (Will Hart/NBC)